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/*************************************************************
*
* streaming external for PD
*
* File: socket.cpp
*
* Description: Implementation of socket functions
*
* Author: Thomas Grill (t.grill@gmx.net)
*
*************************************************************/
#include "stream.h"
// explicit definition of PD report functions
extern "C" {
extern void post(char *fmt, ...);
extern void error(char *fmt, ...);
}
/* Checks if data is waiting on the socket */
static bool CheckForData(SOCKET sock,int wait = 20)
{
struct timeval tv;
tv.tv_sec = wait/1000;
tv.tv_usec = (wait%1000)*1000;
fd_set set;
FD_ZERO(&set);
FD_SET(sock,&set);
// return true when data is waiting
return ::select((int)sock+1, &set, NULL, NULL, &tv) > 0;
}
SOCKET Stream::Connect(const char *hostname,const char *mountpoint,int portno)
{
const int STRBUF_SIZE = 1024;
char request[STRBUF_SIZE]; // string to be sent to server
sockaddr_in server;
SOCKET sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sockfd == SOCKET_ERROR) {
throw "Error opening socket";
}
// get IP address
hostent *hp = gethostbyname(hostname);
if(!hp) {
closesocket(sockfd);
throw "Could not get IP address of hostname";
}
server.sin_family = AF_INET;
memcpy(&server.sin_addr,hp->h_addr, hp->h_length);
server.sin_port = htons((unsigned short)portno);
// try to connect
if (connect(sockfd, (struct sockaddr *) &server, sizeof (server)) == SOCKET_ERROR) {
closesocket(sockfd);
throw "Connection failed!";
}
// check if we can read from the socket
{
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(sockfd,&fdset);
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 500;
int ret = select((int)sockfd + 1, &fdset, NULL, NULL, &tv);
if(ret < 0) {
closesocket(sockfd);
throw "Can not read from socket";
}
}
// build up stuff we need to send to server
sprintf(request, "GET /%s HTTP/1.0 \r\nHost: %s\r\nUser-Agent: 0.2\r\nAccept: audio/x-ogg\r\n\r\n", mountpoint, hostname);
// try to contact server
if(send(sockfd, request, (int)strlen(request), 0) == SOCKET_ERROR) {
closesocket(sockfd);
throw "Could not contact server";
}
// read first line of response
int i = 0;
while(i < STRBUF_SIZE-1) {
if( CheckForData(sockfd) ) {
if(recv(sockfd, request+i, 1, 0) <= 0) {
closesocket(sockfd);
throw "Could not read from socket, quitting";
}
if(request[i] == '\n') break;
if(request[i] != '\r') i++;
}
}
request[i] = '\0';
bool eof = false;
// parse content of the response...
if(strstr(request, "HTTP/1.0 200 OK")) /* server is ready */
{
//post(" : IceCast2 server detected");
while(!eof) {
i = 0;
while(i < STRBUF_SIZE-1) {
if( CheckForData(sockfd) ) {
if(recv(sockfd, request + i, 1, 0) <= 0) {
closesocket(sockfd);
throw "Could not read from socket, quitting";
}
if(request[i] == '\n') /* leave at end of line */
break;
if(request[i] == 0x0A) /* leave at end of line */
break;
if(request[i] != '\r') /* go on until 'return' */
i++;
}
}
// make it a null terminated string
request[i] = '\0';
char *sptr;
if( ( sptr = strstr(request, "application/x-ogg") ) ) {
/* check for content type */
//post(" : Ogg Vorbis stream found");
}
if( ( sptr = strstr(request, "ice-name:") ) ) {
/* display ice-name */
//post(" : \"%s\"", sptr + 10);
}
if(i == 0)
// we got last '\r\n' from server
eof = true;
}
}
else if(strstr(request, "HTTP/1.0 404")) {
// file not found
closesocket(sockfd);
throw "File not found";
}
else {
// wrong server or wrong answer
closesocket(sockfd);
throw request;
}
//post(" : connected to http://%s:%d/%s", hp->h_name, portno, mountpoint);
return sockfd;
}
void Stream::Disconnect(SOCKET fd)
{
if(fd != INVALID_SOCKET) {
closesocket(fd);
post("connection closed");
}
}
int Stream::Read(SOCKET fd,char *buf,int size,int timeout)
{
// check for data availability so that recv doesn't block
if(CheckForData(fd,timeout)) {
int ret = recv(fd,buf,size, 0);
if(ret == SOCKET_ERROR) {
post("socket error!");
return -1;
}
else
return ret;
}
else
return -1;
}
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